One Twitter user warned: "What people don't know is that everybody is not coming into contact with a friendly ghost named Charlie, but several demons.

"These demons that are being contacted may seem friendly at first – but they have sinister plans.

"If you do not say goodbye to 'Charlie' you will experience paranormal situations, as in hearing voices, things being moved, shadows, sinister laughing and more, depending on the atmosphere.

"This game is not safe and I advise nobody to play this game unless they are educated and know what to do."

But like most Twitter crazes, it wasn't long before the One Direction fandom got hold of it – and in this time of turmoil for 1D fans, the temptation to seek a little otherworldly guidance trumped any apocalyptic warnings.

One confused Zayn-lover even asked the demon spirit who her new beau should be now that he's quit the band: